Combined type-writing and computing machine.



F. K. HART- COMBINED TYPE WRITING AND COMPUTING MAfiHINE.

APPLICATION FILED APB- 4, 1916. v

Patented July 4, 1916.

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F. A. "HART.

comsmw TYPE WRITING AND COMPUTING MACHINE.

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U IT D STATES PATENT OFFICE.

FREDERICK A." H' iit'r, or NEWARK; NEW. JERSEY, issreuon 'ro uunzenwoon COM- rurms MAcH Nn COMPANY, or NEW YORK, N. A CORPORATION or NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING MACHINE.

Specification of Letters Patent.

Patented July 4, 1916.

Original application fiiea December 10,-190s, Serial No. 466,836. Divided and this application filed April 14, 1916. Serial No. 91,057.

. New Jersey, have invented certain new and useful Improvements in' Combined Type- WVriting. and Computing Machines, of which the following is aspecification.

'- My invention relates to combined typewriting and computing machines, and more particularly to the carriage-return mechanism thereof, and is a division of my application, No. 466,836, filed December 10, 1908.

An object of my invention is to improve the carriage-return mechanism of machines in which the main operating part is used to operate computing wheels or devices and to return the carriage and line-space the platen. v

An important feature of my invention is the arrangement of parts by which the main operating member, although moved a con stant stroke at each operation of thema chine'to operate the computing mechanism,

transmits to the carriage-return mechanism movements which may be easily and con veniently varied at will.

The improved mechanism is illustrated in the accompanying drawings, whereln like characters refer to like parts throughout the several views.

Other features and advantages of the invention will hereinafter appear.

In the accompanying drawings, Figure 1 is a side elevation of a. combined typewriting and computing machine, of the type disclosed in my former amflicati-oii. In said view, a part ofthe casing of the computing machine is broken away in order' to show some of the interior mechanism. Fig. 2 is a top plan view of. the machine shown in Fig. 1.

Referring to the drmvings. 1 represents the typewriter frame, and 2 the typewriter carriage. The usual type-bars 3 are provided, under control of alpha-bet keys 4 and ment bythe usual escapement mechanism, which includes the escapement dogs 7, engaging the escapement wheel 8, to which is connected another wheel 9, which meshes with a rack 10, carried by the typewriter carriage. The usual scale 11 is fixed onthe frame of the typewriter, and over this scale, the pointer 12, carried by the carriage, indicates the position of "said carriage. The.

usual margin gages 13 are also provided.

v The typewriter illustrated is a. No. 5 Underwood, the construction and operation of which is well understood.

The computing mechanism is fully illus-' trated in my application referred to above, and also in'the British Patent No. 3390 of 4912. Said computing mechanism is inclosed in a casing 14:, which casing carries a shaft 15, on which are mounted, for independent rotation, the computing wheels 16. The computing wheels carry gears which mesh with the teeth of underlying register bars, 18 and are subject to the action of the latter when the general operator 21 is moved forward. Adjacent the computing wheels is a parallel shaft,'on which are mounted the six-toothed carrying wheel 19 and the threetoothed wheel 20.

The operation of the computing and carryifig devices is fully describedin the application referred-to, and need not be described in detail here. It may be stated, however,

thatthe general operator 21 carries a cross bar, shown in Fig. 1, which, when said general operator 21 moves forward, contacts with any pins 22, which have been set in bars 18' and drives said bars to turn the wheel 16. The bars '18, which are controlled from the numeral keys 5, are normally in apo'sition so that said keys do not have any effect thereon, but said bars 18 are raised to effective position on the stepping movement of the typewriter carriage through the 'usual transposition bars 23, which act through the'bell-cranks 24: and links 25, to raise the bars 18 one after another. This raising of the bars 18 is under the control of a set of jacks 26, mounted on the frame of the typewritcr and set by the marriage through the medium of the dog 27.

V hen the bars 18 are raised by the train position to be. depressed-by any one of the parallel motion devices 28, which are under control of rock-shafts 29, connected to the keys 5 through the links 30. The operation of any numeral key will therefore set a pin in a register bar 18, corresponding to the denominational position of the carriage, and when the general operator moves-forward, the pins which have been set will determine by their position the amount of turning of the corresponding computing wheel 16, all as set forth in my application above re' ferred to.

In the Hanson Patent, No. 905,421, dated December 1, 1908, adjustable means are shown for imparting variable return movements to the'carriage under constant predetermined movements of the operat'ing'lever of the computing mechanism. My device is an improvement over the construction and operation shown in said Hanson patent.

Describing my improvement in detail, a flexible connection 32 is attached to the linespacing lever 7, and passes over a guide sheave 33, on an arm 34 of the typewriter frame, and is then passed downwardly, and secured to, and adapted to be wound upon a grooved puter frame 14, and carries a'spur pinion- 36, which meshes with a spurgear 37,- loosely" journaled on the operating shaft 38, and adjacent the main operating-lever 31." The said operating lever 31 also carries-a loose spur pinion 39, which also meshes with the spur gear 37, and which is adapted, on, a movement of the operating lever, to be engaged with a similar spur pinion 40, which tion of the arrow marked thereon, in Fig. 1,

. so as to keep the tape free from slack. Preferably also, the supporting arm 41 engages the pinion 40, under sufficient friction to prevent said arm from being accidentally moved from any set position on the gear 37. The arm 41 is designed to be moved to dif ferent positions, the gear 40 during such movements rolling on the gear 37, the friction, above referred to, being suflicient to hold the arm in the arious positions of adjustment. The arm 41 and its pinion l0 constitute a member adjustable to any position along the periphery of the gear 37 for determining how far said gear 37, and consequently the pinion 36 and band 32, shall be driven during movement of the operating lever 31. The operating lever 31 always moves a constant stroke to move the general slack takeup wheel 35. "This wheel 35 is suitably mounted on the com-- operator 21 for driving the computing devices 16. Connected to the operating lever 31, by a sleeve journaled on the shaft 38, is a sector 43, which meshes with a inion 44:,

' which in turn meshes with a racz member 45, forming part of the general operator.

When the operating lever 31 moves forward,

runs into engagement with the pinion 40,

the pinion 39 during such preliminary movement rolling along on the gear 37. \Vhen, however, said pinion 39 runs into engagement with the pinion 40, the two pinions,

by their opposing action or tendency to rotate the gear 37, will lock said gear to the operating lever 31, forming in effect a clutch connection so that the subsequent or continued forward movement of said operating lever will positively rotate the gear 37, and

thereby return the typewriter carriage to a position at the right.

It will be clear from the above that the nearer the pinion 10 is normally set to the pinion 39, the greater the distance will the typewriter carriage be returned, under a complete forward movement of ver 31.

It is evident that the frictional engagethe lement between the pinion 40 and its supporting arm 41 is not required to prevent movement of said pinion and arm in respect to the gear 37, when the two pinions 39 and 40 are engaged, for it is well understood that two pinions or gears engaged with each other and with a third pinion or gear, will interlock, so that no one of the three can rotate in respect to the other.

It will thus be seen that I have pi-ovided a device which may be adjusted at will, to determine the carriage-return from any position to which it may have been moved, said return taking place concomitantly with the movement of the operating lever when making its constant stroke to operate the computing mechanism.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I

claim:

1. In a combined typewriting and computing machine, the combination with computing mechanism and an operating memher having a uniform stroke, of a typewriter carriage returnable from any point in its transverse concomitantly with the stroke of said operating member, and means ad ustable to correspond to any carriage position to determine the extent to which the carriage is returned during the time the operating member is making its uniform stroke to operate the computing mechanism.

2. In a combined typewriting and computing machine, the combination with computing mechanism, of a typewriter carriage, an operating member having a uniform stroke to operate said computing mechanism, means for returning the carriage variable distances during the time the operating member is making its stroke, and an adjustable means for appropriating only as much of the uniform stroke of said operating member as is necessary to return the carriage from any position to which it has been advanced.

3. The combination with a typewriter having a traveling carriage, of means for imparting variable return movement to said carriage, comprising a gear connected to said carriage, an operating lever and an arm pivoted on the axis of said gear, and pinions journaled on said lever and arm, in constant mesh with said gear and engageable with each other, to determine the efiective carriage operating movement of said lever.

4.. The combination with a typewriter having a traveling carriage, of a computing mechanism, means for imparting variable return movement to said carriage, compris-.

ing a gear connected to said carriage, an operating lever, for said computing mechanism, and an arm pivoted on the axis of said gear, and pinions journaled on said lever andarm, in constant mesh with said gear and engageable with each other, to determine the efi'ective carriage operating movement of said lever.

5. .The combination with a typewriter having a traveling carriage, and an associated computing machine having an operating member, of means for imparting variable return movement to said typewriter carriage and a constant movement to said operating member, comprising a gear connected to said typewriter carriage, an operating lever pivoted on the axis of said gear and connected to said operating member, an arm'also pivoted on the axis of said gear, and pinions journaled on said lever and on said arm, in constant mesh with said gear and engageable with each other to determine the effective movement of said lever on said typewriter carriage, under lever movements required to impart predetermined full stroke movements to said operating member.

6. The combination with .typewriting mechanism, including a carriage, of car- Gopie: of this patent may be obtained for riage-return mechanism, computing mechanism, a general operator for said computing mechanism movable at each actuation through a single complete reciprocation, an operating handle, driving trains leading from said handle to said general operator and to said carriage-return mechanism, re-

spectively, and means controlling said trains to positively drive the general operator through such reciprocation and to variably drive the carriage-return mechanism simultaneously with the complete reciprocation ofsaid general operator.

7. The combination with a traveling carriage, of computing mechanism, a member having a uniform reciprocating stroke for operating said computing mechanism, a carriage-return band drawn by said reciprocating member, a drum on which said band is wound, a gear wheel driven by said drum from said reciprocating" member, and a clutch intermediate said drum and said reciprocating member for determining how far said reciprocating member shall turn said drum, while making said uniform stroke to operate said computing mechanism.

8. The combination with a traveling carriage, of computing mechanism, a shaft having a constant movement for operating said computing mechanism, a return band connected to said carriage, a drum on which said return band is wound, and a clutch for driving said drum from said shaft any predetermined adjustable portion of the constant movement of said shaft.

9. The combination with a traveling carriage, of computing mechanism, a shaft having a constant movement for operating said computing mechanism, a return belt for said carriage connected to be drawn by said shaft, and means comprising a gear train in driving connection with said belt, one member of said train being'adjustable for varying to any degree the amount said shaft shall draw on said belt at each constant movement of said shaft.

10. The combination with a traveling carriage, of a member having a uniform reciprocating stroke, a carriage-return band drawn by said reciprocating member, a drum on which said band is wound, a gear w reel for driving said drum from said reciprocating member, and a clutch intermediate said drum and said reciprocating member for determining how far said rec1procating member shall turn said drum.

FREDERICK A. HART.

Witn esses ARTHUR A. JOHNSON, EDITH B. LIBBEY.

five cents each, by addressing the "Commissioner ct Patentl, Washington, D. G." 

